Pull Italian - namely ... (2,3)
I believe the answer is:
to wit
'namely' is the definition.
(I've seen this before)
'pull italian' is the wordplay.
'pull' becomes 'tow' (tow is a kind of pull).
'italian' becomes 'it'.
'tow'+'it'='TO WIT'
(Other definitions for to wit that I've seen before include "specifically" , "That is to say" , "Namely" , "In other words" , "what to do with a broken-down car!" .)